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Table 3 Acid–base parameters, hemofiltration settings, gas exchange and respiratory/ventilation parameters

From: Low bicarbonate replacement fluid normalizes metabolic alkalosis during continuous veno-venous hemofiltration with regional citrate anticoagulation

Parameter

0 h (at switch)

24 h (after switch)

p

N = 42

N = 40

Acid–base parameters

 Bicarbonate, mmol/l

27.7 (26.9–28.9)

25.8 (24.6–27.7)

0.000*

 Base excess, mmol/l

4.0 (3.1–5.1)

1.8 (0.2–3.4)

0.000*

 pH

7.42 (7.38–7.47)

7.43 (7.37–7.46)

0.311

 Lactate, mg/dl

12.0 (7.3–14.0)

12.0 (8.0–15.0)

0.728

Haemofiltration settings

 Pre-dilution pre-blood pump fluid (Prismocitrate™), ml/h

1200 (1200–1300)

1,273 (1200–1300)

0.569

 Substitution rate, ml/h

800 (600–1000)

800 (500–1000)

0.943

 Fluid removal, ml/h

100 (100–188)

100 (100–150)

0.543

 Blood flow, ml/min

120 (125–130)

120 (120–130)

0.884

 Filtration fraction, %

33 (30–36)

33 (30–35)

0.799

 Temperature, °C

41.0 (40.0–43.0)

41.0 (39.8–43.0)

0.863

 Citrate dose, mmol/l

3.0 (3.0–3.2)

3.0 (3.0–3.2)

0.127

 Ionized serum calcium, mmol/l

1.09 (1.03–1.15)

1.06 (1.00–1.12)

0.170

 Calcium dose, mmol/h

2.45 (2.10–2.88)

2.65 (2.28–3.20)

0.196

 Calcium substitution, %

90 (85–105)

100 (88–111)

0.000*

 Post-filter calcium, mmol/l

0.41 (0.37–0.43)

0.37 (0.36–0.40)

0.006*

Gas exchange and respiratory/ventilation parameters

 PaCO2, mmHg

43.2 (39.7–47.5)

39.6 (36.8–46.1)

0.678

 PaO2, mmHg

82.9 (70.1–95.7)

84.2 (71.4–97.2)

0.691

 Peripheral arterial oxygen saturation, %

97.0 (93.7–98.3)

96.8 (95.5–98.3)

0.767

 PaO2/FiO2 ratio, mmHg

227 (131–298)

213 (136–328)

0.834

Ventilator parameters

N = 25

N = 23

 

 Respiratory rate, breaths/min

17 (14–20)

17 (15–20)

0.971

 FiO2

0.35 (0.30–0.50)

0.35 (0.30–0.53)

0.861

 Tidal volume, mL/kg PBWa

6.3 (5.8–6.9)

6.5 (5.9–7.8)

0.511

 Set positive end-expiratory pressure, cmH2O

8 (8–10)

8 (8–10)

0.733

 Peak pressure, cmH2O

19 (16–21)

18 (16–21)

0.529

 Driving pressure, cmH2O

10 (7–12)

9 (8–12)

0.510

 Minute ventilation, mL/kg PBWa/min

105 (85–123)

111 (85–135)

0.511

Non-invasive ventilation parameters

N = 17

N = 17

 

 FiO2

0.50 (0.23–0.68)

0.40 (0.21–0.49)

0.177

 Respiratory rate, breaths/min

16 (15–18)

20 (13–24)

0.404

  1. Data reported as median (IQR), unless otherwise specified
  2. aPBW predicted body weight